论文标题
全球原始磁盘中垂直剪切不稳定性的波动性质
Wavelike nature of the vertical shear instability in global protoplanetary disks
论文作者
论文摘要
垂直剪切不稳定性（VSI）是辐照原球盘（PPD）中的一种强大现象。以前的大多数数值模拟都集中在其饱和状态的湍流特性上。但是，VSI的饱和表现为大规模相干径向传播的惯性波。在本文中，我们研究了惯性波 - 盘相互作用及其对VSI饱和的影响。惯性波线理论是开发的，并应用于使用Athena ++代码的代表性全局2D模拟。发现VSI通过将磁盘分离成几个径向波带（通过旋转共振）（转弯点）大致划分的几个径向波带来饱和。该结构还表现出垂直湍流强度的适度径向变化。未来的数值工作应采用大型径向域来适应VSI的径向结构，同时采用足够精细的分辨率来解决攻击饱和VSI惯性波的参数不稳定性。
The vertical shear instability (VSI) is a robust phenomenon in irradiated protoplanetary disks (PPDs). The majority of previous numerical simulations have focused on the turbulent properties of its saturated state. However, the saturation of the VSI manifests as large-scale coherent radially travelling inertial waves. In this paper, we study inertial-wave-disk interactions and their impact on VSI saturation. Inertial-wave linear theory is developed and applied to a representative global 2D simulation using the Athena++ code. It is found that the VSI saturates by separating the disk into several radial wave zones roughly demarcated by corotation resonances (turning points); this structure also manifests in modest radial variations in the vertical turbulence strength. Future numerical work should employ large radial domains to accommodate this radial structure of the VSI, while concurrently adopting sufficiently fine resolutions to resolve the parametric instability that attacks the saturated VSI inertial waves.
